Characteristics of atom-molecule elastic scattering

Through numerical calculations for some typical systems, we explore the general characteristics of low-energy atom-molecule interaction for a molecule in its ground rovibrational state and over a range of energies in which only elastic collision can occur. In particular, we explore the role of the anisotropic part of the atom-molecule potential on both the background and the resonances of their elastic scattering. This work is a part of an exploration related to the application and the further development of multichannel quantum defect theory (MQDT) for atom-molecule interactions.